/**
 * Copyright 2000 self.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 *
 * @author Ashin Wimalajeewa
 */
package self.amigo.elem.uml;

import java.util.HashMap;
import java.util.Map;

import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

import self.awt.ILineRenderInfo;
import self.gee.IGraphicElement;
import self.lang.StringUtils;
import self.xml.DomUtils;

public class StateTransitionView extends ElementryLinkView {
	
	/**
	 * If the internal state of this class ever changes in such a way that it can't be defaulted,
	 * then the {@link #serialVersionUID} should be incremented to ensure serialized instances cleanly fail.  
	 */
	private static final long serialVersionUID = 1;
	
  final static public String STEREOTYPE_PROP  = "stereotype";
  final static public String EVENT_SIG_PROP   = "eventsignature";
  final static public String GUARD_COND_PROP  = "guardcondition";
  final static public String ACTION_EXPR_PROP = "actionexpression";

  public StateTransitionView() {
    ((ConfigurableCore) delegate).setSideHead( false, ILineRenderInfo.OPEN_ARROW_HEAD );
  }

  protected IGraphicElement createDelegate() {
    TransitionCore line = new TransitionCore();
    return line;
  }
  
  protected class TransitionCore extends ConfigurableCore {
  	
	/**
	 * If the internal state of this class ever changes in such a way that it can't be defaulted,
	 * then the {@link #serialVersionUID} should be incremented to ensure serialized instances cleanly fail.  
	 */
	private static final long serialVersionUID = 1;
	
    protected String eventSignature = "";
    protected String guardCondition = "";
    protected String actionExpression = "";
    
    // IEditableElement support
    public void       getProperties( Map store ) {
      store.put( STEREOTYPE_PROP, header );
      store.put( EVENT_SIG_PROP, eventSignature );
      store.put( GUARD_COND_PROP, guardCondition );
      store.put( ACTION_EXPR_PROP, actionExpression );
    }
    
    private void resetName() {
      StringBuffer transString = new StringBuffer( eventSignature );
      if ( !StringUtils.isNullOrEmpty(guardCondition) ) {
        transString.append( " [" );
        transString.append( guardCondition );
        transString.append( ']' );
      }
        
      if ( !StringUtils.isNullOrEmpty(actionExpression) ) {
        transString.append( " /" );
        transString.append( actionExpression );
      }
      name = transString.toString().trim();
    }
    
    public void       setProperties( Map data ) {
      header = (String) data.get( STEREOTYPE_PROP );
      eventSignature = (String) data.get( EVENT_SIG_PROP );
      guardCondition = (String) data.get( GUARD_COND_PROP );
      actionExpression = (String) data.get( ACTION_EXPR_PROP );

      resetName();
      layer.setDirty();
    }

    protected void readGeneralLineInfo( Node self, HashMap idObjLookUp ) throws DOMException {
      header = DomUtils.getElementAttribute( self, STEREOTYPE_PROP );
      eventSignature = DomUtils.getElementAttribute( self, EVENT_SIG_PROP );
      guardCondition = DomUtils.getElementAttribute( self, GUARD_COND_PROP );
      actionExpression = DomUtils.getElementAttribute( self, ACTION_EXPR_PROP );
      resetName();
    }
  
    protected void writeGeneralLineInfo( Document doc, Element self, HashMap objIdLookup ) throws DOMException {
      DomUtils.setElementAttribute( self, STEREOTYPE_PROP, StringUtils.toEmptyIfNull(header) );
      DomUtils.setElementAttribute( self, EVENT_SIG_PROP, StringUtils.toEmptyIfNull(eventSignature) );
      DomUtils.setElementAttribute( self, GUARD_COND_PROP, StringUtils.toEmptyIfNull(guardCondition) );
      DomUtils.setElementAttribute( self, ACTION_EXPR_PROP, StringUtils.toEmptyIfNull(actionExpression) );
    }
  }
}
